Pace & Race Time Calculator
Discover your Pace, calculate the exact time to finish a Marathon or generate kilometer-by-kilometer splits for your next run.
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Race input
Strategy and goal
Main reading
Estimates use Riegel's equation (T₂ = T₁ × (D₂/D₁)^1.06) and percent-of-pace training zones. Real performance depends on terrain, weather, training and recovery. Not medical advice — consult a running coach for individualized planning.
Advanced analysis
Equivalencies and splits help with strategy, but don't replace fine-tuned adjustments for training, weather, elevation, and race-day execution.
§ How to use
How to calculate running pace
Convert time + distance into pace per km/mile, or pace + distance into total estimated time — for runners of any level.
Pick the conversion
Time→Pace, Pace→Time, Speed→Pace, Pace→Speed. The most common conversions for runners.
Enter the values
Time as HH:MM:SS or MM:SS. Distance in km or miles. Pace in min/km or min/mi.
See the instant conversion
Updates in real time. Compare with reference paces (a 25-min 5K = 5:00/km pace).
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